Why do you do what you do?

Two years apart seems to be the average around here, I never thought that was *close* in age. My oldest two are 15 months apart, but they have been very different since the days they were born. There is then a four year span then the rest of them are between 22month and 26 months a part. Again, each one is a different as night and day. I have one who has always been an extravert, from the day she was born. She went through two years of preschool, simply b/c that's what was best for her. Another one of my kids was so introverted that it was painful...that's the child that we home schooled through 3rd grade. The others have fallen somewhere in between thse two extremes.